1. UPDATE disc SET asset_source_uuid = NULL FROM ca_discovered_software disc LEFT JOIN ca_agent agent on disc.asset_source_uuid = agent.object_uuid WHERE disc.asset_source_uuid IS NOT NULL AND agent.object_uuid IS NULL

Add the Upload Replication task to Engine and try running it again. If error persists even after executing the above query then execute the below query by unlink the Upload Replication task.

2. update ca_replication_status set modified_status =0x0 where replication_conf_uuid in

(select replication_conf_uuid from ca_replication_conf where table_name ='ca_discovered_hardware' and direction>-1)

Now Add the upload replication task again and run . Open a issue with CA if it still shows ERROR.